Carbureter.



M. E. BABBITT 5;' J. P. BEAUMONT.

. GABURBTBR. f

APPLICATION FILED JULY 22, 191,2.

Patented Mar. 30, 1915.

ZZ 22 Z 2 linu- .Beit known that we, lf/liiies E. BAeisi'ii. e. resident of Brookfield, eiid JAMES F. BEAUMONT, e reside-nia ei 'Yifoi'cesten in *die county of Worcester end Commonweelli of Messacliuseiis, bolli citizens ci' the United States, have jointly invented e new and useful improvement in Cerbuieters, of -which the following is o.. specification, accompenied by diefwings forming e peri olf the seme.

Our inveniion. relates to internal combustion engines and iesid'es particularly in certain improvements in cebui'etei's im* this 'type 0i engine.

Oui' improved carbuieiei is designed mainly foiuse in connection Wii'li automobile engines using gesoleue zioi' fuel, eliliough it is obvious thai; be used in 'couzuecion with engines foi driving eiche-i kinds of machines, oi Wili tlieee using some other fuel.

@ne object of our inveiiion is So provide ineens iol* heal-ing; elle gesoleue oi other uel jusib prim to its being mixed with 1iJlie air, and his feaguie We believe to be bioadly new. Tliexe is e decided. edi/'mileage in warming lie fuel ei; this point .in Limi ie will cause the fuel te mix more time ouglily and quickly with the :iii: :is they come together9 and tbe resulting mixuife will be more easily ignied, bozli for the ree sons just stated, and for' the reason elles the mixiure is Wei'mei' than it would have been if the 'fuel had not been warmed as described.

Other objects and advanieges 0i cui iiivcntion will appear :is 4elle desciipiou proceeds. l

in order to make our iiiveiiision clear, We lieve shown in the accompanying drawings und in connection tliei'ewith will proceed io describev what We believe io be the most desirable ferm thereof, but cbvieusljT veiious changes may be mede Without diepere ing from oui invention es defined in the appended claim.

In the drawings, Figure l is e View in elevation ci one form of our ceibui'eter connected with e Hoei; chamber. Fig. v2 is e. similar view except hat the cerbureter is showuin section, and Figs. 3, e, 5 and 6 are face views of the valve plezesusedin eutometielly essistingin :regulating @he lei' paris lii'ou The frame ci ille ceieuie two parte, lie leweif pail; l eoiiteieiiig the eil' chamber 27, zuid zlie upper loert 3 containing the mixing cliembei e float chamber 5 is eoimeeeed 'viili lie eerbureei io sup ply fuel iii u. my suiizeble float chambei' may be used es it ioims ne part of 'elle pieseiiy inveiiion, and a specific description ci the chamber is liei'eioi'e not necessary. Asltli'e fuel leaves 'lie ilozi: elieuibei 59 it passes inte :i simili clieinbei C .fi-em which e needle passage T cei'i'iee lie fuel cn ic tile .mixing clieiiibei' weife ii comes into cui wili lle is mixed "ebeiewiili, 'lilie chamber hin 'Wali 8 ou 'elle fdc isa second cliembe? ii coil l0 held. limb wie ll, "Wliieli also i l'ie el'iember 95 se l0 may easily iemcveel iiiuii'ib nui; il carries eui'ieii; io ehe iesisi-eiiee `mliifjaei' being' insulated from elle thumb mit by i' suleeiiig bushing 13. rllie otliei coiidue-or 3 ein gliescurce of current ele "ieelljf io mechanically @ou necied io the :une au die eerbuieier by the i l resistance coil lO'lias one screw lie of ies ieimiuals coen ici-ed o elle eonductorj l2', es indicated iii n 2. and its otliei ie?- minel is so iecziied eu tbe eui'iace oielie coil time is pressed iirrely against elle freine oi elle ceibuief'ei" by ille zbliumb mit il, :thus coiiiplebiic" tbe ciieuidA io the nher coiiducoi le. e eleeiic cursen@ pees'- i isfiice soil i0 geuei'etes eee iii u e @eil jpiedeieimiued i tage ci the battery This heet passes l e "bini Wall .8 to

6, hus Warming fd l-eepiiig ii'. Warm chamber. The edif'zmi-e es vmiviiiiug lie fuel ai; ibis poiiic have been sieied 'llhe pei-tiel vacuum cremated in. cylinder @if cylinders duiiing yele causes e' more oi.' less violeiu ai? elirough oi' other sourceid? sul lijf eonducfL-ioii liieu by glie of the air intake opening 16 into the chamber near the top of the needle passage 7, so tliat Y as the air rushes past the end of this needle passage a quantity of the fuel will be drawn outl of the end /of the passage by suction, converted into the form of a tine spray and thoroughly mixed with the air in the mixing chamber 4.

To regulate the size of the intake opening 16 in accordance with the temperature ol' the outside air, we provi'de a cap 18 of approximately the size of the upper end of the l passage 19 leading to the air chamber 2 and adjustably separated from the end of such passage. The cap 18 is supported in its adjusted position by a cross bar 2O rigidly connected with the sides of the passage 19,

this cross bar 20 carrying an upright thread ed post 2l onto which the cap 18 is screwed, as shown. The cap is secured. in any de sired adjustment by a lock nut 22. By varying the adjustment of the cap 1S along tha post 21, it is obvious that the size of the intake opening 16 is correspondingly varied. and the quantity of air admitted through this O penin thereby regulated for the purposes alrea y stated. We have found that under certain conditions, as when the speed ot' the engine is considerably abore normal, the amount of air necessary cannot pass quickly enough through the opening 16, the

size of which has been adjusted for normal or average conditions. vVe therefore piovide for the further admission of air when required by providing the perforated plate mounted in the wall of the air chamber 2. This plate has its periphery screw-threaded so as to fit to corresponding. threads in the opening in which the plate is mounted. The plate 23 slidably supports one end of a. short rod 24 passed through a hole in its center, the other end of the rod 24 'being slidably held in a support 25 rigid with the frame of the carbureter. A second plate 26 is slidally mounted on the rod 2l and is held in contact with the inner face of the plate 23 by a I'spiral spring 27 surrounding the rod 24 and confined between the plate 26and the stop 2S fixed to the rod 24. The plate 26 is unpertorated except to accommodate the rod through its center and vis large enough to cover and close all the perforations in the.

plate 23. The two plates 23 and 26 are held together and the pressure between them is regulated by the thumb nut 2npfl`he opening in the supportl25 ispolygonal and the` rasante through the intake opening 16, it is obvious that a partial vacuum greater than'normal will be created in the air chamber 2. With a proper adjustment of the thumb nut 29,

. however, the plate 26 will be moved against the pressure of the spring 27, when the difference in pressure between that of the outside air and that of the air in the air chamber 2 has reached a predetermined maximum. Automatically acting means is thus provided for limiting the vacuum 1n the l. air chamber 2 to a predetermined maximum and as a result it is assured that there willl i be a sufficient supply of air in the air chamber under all conditions even though the primary air intake is adjusted to normal conditions. We also ind that under certain conditions, such as already referred to, air cannot pass quickly enough through the annular passage surrounding thev upper end of the needle passage 7. To overcome this diliculty, we provide the perforated flat annular ring 30 threaded or otherwise suitably mounted in the opening between the air chamber 2 and the mixing chamber 4. Covering and? closing the perforations in this annular ring 30 is a second flat annular ring 31 slidable on headed studs 32 rigidly mounted in the ring 80. rIhe rings 30 and 8lv are held yieldably in contact by the springs 83 oonined betweensthe movable ring 31 and the heads of the studs 32. The central openings in the rings 30 and 31 form the annular openings surrounding the upper end oi' the' needle passage 7. Bath of the rings 30 and 31 are perforated for the passage of air, but these perforations do not register and so when the rings are in cony -tact no air can pass through the perforamixing chamber 4 and that in the air chamber`2`will be' created sufficient to overcome the pressure of the springs 33, the pressure of these springs against the ring 31 having been properly adjusted, of course, by turning the threaded studs 32. The ditference in pressure between that in the mixing chamber l and that in the air chamber 2 is thus automatically limited to a predetermined maximum.

The usual throttle Valve 17 is rotatably mounted in the passage between the mixing chamber 4 and the manifold for regulating the supply of fuel to the engine. The axis of the throttle valve is extended through the wall of the passage in which it is located and on the enter endof this axis is secured nected at its lower end With suitable controlling mechanism Within 'reach of e person r driving the engine. The crank arm 34 oscillates in a slot in a shelf or plate 35, the material at each end of the slot being 'turned up at an angie` to iorm supports 36 for acijustable screws 37, which form stops to limit the oscillations of the crank arm 34;, so that at one extreme position of said crank arm the throttle valve will be closed and at the other extreme position, the throttle valve Willrbe Wide open.

In a carbureter, the combination, with e shell or casing having a fuel passage therein connecting the fuel supply means with e spray nozzle, of an exterior hollow boss on ,said .easing aclacent said passage, there being a thin Wa 1 between said passage anni the interior of said boss, a resistance coil tted within said boss in Contact with said Wall, anda detachable closure foi said boss for maintaining said coil in position.

MILES E. BABBTT. JAMES F. BEAUMONT Witnesses: i PnNEnoPE COMBERBAGH, NELLE WEALEN. 

